08 Forest 2.5x AT Engine Shake, Exhaust Fail after SparkP Cable & Coil /Valve Cover Gasket job

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I used a floor jack to lift the motor up to pull the gasket covers off and I fear I may have damaged the exhaust manifold or some other connection causing a loss of vacuum or leaking exhaust or both. The engine is shaking and idle drops low on stopping but doesnt die. Starts just fine accelerates but acceleration is slow and pedal feels soft. Im considering cleaning exhaust and air intake sensors, replacing camshaft sensors and any additional questions or advice is welcome. TY First post.

2008 Subaru Forester 2.5Lx AWD AT 115kmiles
 

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